What are macromolecular colloids?

Macromolecular colloids. The colloidal particles are aggregates of a large number of atoms or molecules having a diameter of less than 1 nm. The colloidal particles are macromolecules having a very large molecular mass. Weak van der Waals forces are present between particles.

What do you mean by macromolecular colloids?

Macromolecules in a suitable solvent form solutions in which the size of the macromolecules may be in colloidal range. Such colloids are called macromolecular colloids. These colloids are quite stable and resemble true solutions in many respect, e.g., starch dispersed in water.

What are macromolecular colloids give one example?

Examples of macromolecular colloids: – Macromolecules like starch, cellulose, proteins, polymer like rubber, and gelatin. These molecules have sizes in the colloidal range and their dispersion forms macromolecular colloids.

What are macromolecular colloids Class 12?

Macromolecular colloids: These colloids consist of one single large size molecule as a dispersed phase, e.g., polythene. Associated colloids: These are the colloids which behave as normal electrolytes at low concentration but as a colloid at higher concentration.

Which of the following is a macromolecular colloid?

Soaps and detergent are macro-molecular colloids.

What is association colloid?

Association colloids are microheterogeneous systems in which the particles of the colloidal dispersed phase (micelles) are formed by the agglomeration of molecules or ions of the substance dissolved in the dispersion medium.

What type of colloid is smog?

Some colloidal substances are a mixture of colloid types. For example, smog is a combination of liquid and solid particles dispersed in a gas (air), and latex paint is a combination of liquid latex particles and solid pigment particles dispersed in another liquid.

What is difference between Multimolecular colloids and macromolecular colloids?

Multimolecular colloids are formed by the aggregation of a large number of simple molecules, macromolecular colloids consists of macromolecules having size in the colloidal range. On the other hand, associated colloids also called micelles, are generally electrolytes. Soap is a common example of associated colloids.

What is dispersed and dispersion medium?

Dispersed phase: The phase that is scattered or present in the form of colloidal particles is known as dispersed phase. Dispersion medium: The medium in which the colloidal particles are dispersed is called dispersion medium.

What is Peptization 12th?

Peptization is the process of formation of colloidal sol in which conversion of fresh precipitate into colloidal particles by shaking it with the dispersion medium with the help of a small amount of suitable electrolyte. The electrolyte which is added is called a peptizing agent. This gives particles of colloidal size.

What is the process of Peptization?

Peptization or deflocculation is the process of converting precipitate into colloid by shaking it with a suitable electrolyte called peptizing agent. When colloidal particles bear a same sign electric charge, they mutually repel each other and cannot aggregate together.

Is protein a macromolecular colloids?

Answer: Out of Sulphur sol and proteins, Sulphur sol forms multimolecular colloids. Sulphur sol consists of particles containing a thousand or more S8 molecules. On the other hand, proteins form macromolecular colloids.

Is cellulose a macromolecular colloids?

b. Macromolecular colloids: Macromolecules (starch, cellulose, proteins and nylon, polyethene, etc.) Such systems are called macromolecular colloids.

Is nylon a macromolecular colloid?

Such systems are called macromolecular colloids. Examples of naturally occurring macromolecules are starch, cellulose, proteins and enzymes; and those of man-made macromolecules are polythene, nylon, polystyrene, synthetic rubber, etc.

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